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United States Patent | 5,532,053 |
Mueller | July 2, 1996 |
The present invention relates to a laminate film useful as a material from which to manufacture surgical and other protective garments. The laminate film comprises at least one layer formed from a first polyetherester copolymer produced from the condensation reaction of dimethyl-1,4-cyclo hexane dicarboxylate and 1,4-cyclo hexane dimethanol and poly(tetramethylene ether glycol) and a second layer comprising a material selected from the group consisting of an ethylene-vinyl acetate copolymer, an ethylene methacrylate copolymer, a second polyetherester copolymer, an anhydride modified polyolefin copolymer, and a polyether block amide copolymer. The total amount of the first polyetherester copolymer present in the laminate is greater than or equal to 35 wt. % of the total weight of the laminate film to provide strength to the laminate film. The laminate film may be bonded to one or more layers of polyesters, polyolefins, polyamides, and non-woven fabrics.
Inventors: | Mueller; Walter B. (Inman, SC) |
Assignee: | W. R. Grace & Co.-Conn. (Duncan, SC) |
Appl. No.: | 203540 |
Filed: | March 1, 1994 |
Current U.S. Class: | 442/395; 428/349; 428/475.2; 428/476.3; 428/483; 428/516; 525/173; 525/176; 525/178; 525/425; 525/437; 525/444; 528/272; 528/300; 528/301; 528/307; 528/308.6; 528/335 |
Intern'l Class: | B32B 027/02; B32B 027/08; B32B 027/36; C08G 063/668; 476.3; 349 |
Field of Search: | 428/423.1,423.7,423.5,289,286,290,287,518,516,483,265,267,246,252,475.2,480,483 604/304,306,307 528/272,300,301,307,332,335,308.6 525/173,176,178,425,437,444 |
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4349469 | Sep., 1982 | Davis et al. | 524/765. |
4493870 | Jan., 1985 | Vrouenraet et al. | 428/245. |
4685455 | Aug., 1987 | Vrouenraet | 128/156. |
4698372 | Oct., 1987 | Moss | 521/145. |
4725481 | Feb., 1988 | Ostapchenko | 428/213. |
4759354 | Jul., 1988 | Quarfoot | 128/156. |
4808675 | Feb., 1989 | Twilley et al. | 525/408. |
4847142 | Jul., 1989 | Twilley et al. | 428/252. |
4867150 | Sep., 1989 | Gilbert | 128/155. |
4897274 | Jan., 1990 | Candida et al. | 426/127. |
4908260 | Mar., 1990 | Dodia et al. | 428/215. |
4925732 | May., 1990 | Driskill et al. | 428/336. |
4938752 | Jul., 1990 | Vrouenraets et al. | 604/370. |
4968464 | Nov., 1990 | Kojoh et al. | 264/41. |
5035687 | Jul., 1991 | Sandbank | 604/180. |
5169712 | Dec., 1992 | Tapp | 428/315. |
5219325 | Jun., 1993 | Hennink et al. | 602/41. |
Foreign Patent Documents | |||
0199871 | Nov., 1986 | EP. | |
0398611A1 | Nov., 1990 | EP. | |
WO89/08556 | Sep., 1989 | WO. |
GB Abstract Sep. 10, 1993 Anonymous. |
__________________________________________________________________________ SEALANT INTERNAL CORE INTERNAL OPTIONAL LAYER LAYER LAYER LAYER SEALANT LAYER __________________________________________________________________________ PEBAX ECDEL OR ECDEL SAME AS OTHER SAME AS OTHER 1074 BLENDS OF PEBAX INTERNAL LAYER SEALANT LAYER 1205 ECDEL WITH OR HYTREL ETC HYTREL OR OR BLENDS EVA PEBAX EMA ANHYDRIDE MODIFIED EMA EVA LDPE LLDPE BLENDS OF ABOVE WITH ECDEL PEBAX OR HYTREL __________________________________________________________________________
TABLE 1 ______________________________________ WATER VAPOR TRANSMISSION GRAMS/M.sup.2 GAUGE SAMPLE at 100% RH (MILS) ______________________________________ 1 1717.4 1.30 1742.2 1.14 1643 1.34 2 2374.6 1.12 2325 1.10 2604 1.01 3 1264.8 1.26 1388.8 1.13 1866.2 1.23 4 2554.4 0.84 2411.8 0.89 2139 1.02 5 1748.4 1.10 1612 1.06 2132.8 1.01 6 2201 1.21 3031.8 0.92 2247.5 1.18 7 2287.8 1.02 2542 0.97 2294 1.01 ______________________________________
TABLE 2 ______________________________________ AVERAGE MVTR SAMPLE GRAMS/m.sup.2 ______________________________________ 1 821.5 2 851.0 3 962.6 4 875.8 5 1015.3 6 903.6 7 922.3 8 1247.8 ______________________________________